When riding the Toronto Transit Commission subway system, one frequently overhears numeric codes on the Public Address (PA) system. The following is a list of known codes, and what they mean.
- 12 Fire department
- 17 Police department
- 40 Line supervisor
- 42 Tower supervisor
- 48 Security Investigator
- 99 Subway Mechanic
- 125 Chief General Manager
- 130-146 Superintendents
- 148 ??? 48's boss
- 199 Subway mechanic supervisor
- 21? Superintendents.
- 299 Supervisor (of 199?)
- 506 Janitors
- 520 Painters
- 606 Radio crew
- 632 Signal maint.
- 653 Electrial crew
- 721 Track patrol
- 722 Track lubricator
- 800 Photographers
- 80? Superintendents
- 828-831 Emergency truck
- RT10 Garbage car